Flanged lock nut unit



Patented Nov. 6, 1945 FLANGED LOCK NUT UNIT Francis Le Barron Lord,Bloomfield, N. 1., as-

signor to Titelox Manufacturing Company, Montclair, N. .L, a corporationof New Jersey Application October 3, 1944, Serial No. 556,981

1 Claim.

The device of this invention is designed primarily to serve as aconnector for uniting two a flanged lock nut unit of suchstructure as toenable the attainment of a predetermined wrapping effect on assembly ofthe parts.

An embodiment of'a structure employing my invention is shown in theaccompanying drawing and described in detailin the ensuingspeciflcation. This embodiment is merely by way of example and myinvention is not limited thereto but includes all other forms whichwould come within the scope of the appended claim.

In the drawing,

Fig. 1 is a disassembled perspective view of the tion of force in thethreading operation described hereinafter. The external member i2, withthe internal member I i resting on the flange ll, receives the head 22of the pipe section or the like on the flange i1, said pipe 20 or thelike having a shouldered portion 23 adapted to abut the flange ll.External member l2 with the internal member II and the head 22 of pipesection 20 positioned therein as described above, is brought intoalignment with the threaded extension 26 of the pipe section 2| or thelike to be secured to the pipe section 20. The head 22 of thepipe'section 20 and the threaded extension 26 of the pipe section 2| arepreferably provided with complementary faces 24 and25 adapted to beeileetively secured together by the structure of my invention. With theparts assembled as shown in Fig. 3 and above described, the externalmember 12 is rotated so that the threaded extengq sion 26 of the pipesection 2i will be drawn instructure of my invention comprising aninternal member and an external flanged member,

Fig. 2 is a top plan view thereof taken on line 2-2 of Fig. 3, showingthe unit in assembled relation, I i

Fig. 3 is a side elevational view, partly section'- al, partlyfragmentary, taken on line 3-3 of Fig. 2, in the direction of thearrows, and

Fig. 4 graphically illustrates the comparative effectiveness of the unitof my invention relative to standard, thread-engaging members.

In the embodiment of the invention shown in Fig. i of the drawing, theunit Ill comprises an internal member I I adapted to be received withinexternal member l2. The internal member II is provided with an internalthreaded aperture l3 and with an axial slit II and an external keywayl5, and is externally tapered for a purpose presently explained. Theexternal member I2 is provided with an internal tapered aperture 18,internal flange i'l defining the lower end thereof, and with a ke I8protruding into the aperture It.

In operation, when it is desired to assemble the parts to hold pipesections 20 and 2! or the like together, the internal member I I isinitially com- 35 ture l3.

wardly into the threaded aperture l3 of the internal member ,ll untilthe threaded extension 26 abuts the flange II or is otherwise precludedfrom further movement into the threaded aper- Continued rotation of theexternal member l2 will cause further threading of the parts describedso that the internal member II will then be progressively advancedtoward the narrow end of the aperture it of the external member l2against the resistance ofiered thereby. The iutemal member ii thusadvances in the 'extemal member i2 away from the flange II in thegeneral direction indicated by the arrow 28 (Fig. 3) in the longitudinalaxis of the unit Iii. The internal member II is simultaneously movedlaterally at right angles to the axis plane as indicated by the arrow29. It is thus possible to attain a high degree of efficiency in thetransmission of the energy exerted in the rotating of 40 the member l2to the interengaging of threads l3 and 21. This is attained by virtue ofthe fact that force exerted on the threaded portion I: of the internalmember ll will be the product of the movement of member H on the generallongitudinal axis indicated by'the arrow 28 multiplied by its movementat a plane at right angles I thereto generally designated by the arrows29.

pressed to enable it to be positioned within the the internal member llso that one may obtain aperture iii of the external member with key is Ireceived in the keyway l5 and the internal member resting on the flangeII. The relative dimensions of the parts are such that the internalmemher It may thereafter be advanced toward the narrow end of theaperture 16 only on the exer- The keyway i5 is located at apredetermined I circumferential point relative to the slit ll of I ingto the eflect or" wrapping a loop about a rod wherein more than half ofthe loop is wrapped it on the rod if desired. If the keyway I5 islocated neutral point" so that no wrapping effect would be attained; Byselecting a circumferential point at which the keyway I is locatedrelative to the slit l4 other than 180, one may fix the wrapping effectto be. attained, and the tendency of the parts to resist disengagementand to favor either a tightening or loosening tendency after assembly.

The slit 1! permits the internal member II to be tightly compressed onthe threaded portion 21 of the member with which the unit l0 engages sothat all surfaces of the engaging threads will be bound together and incontact. This feature is graphically illustrated in Fig. 4, indicatingthat both oppositely inclined planar surfaces of the threads l3 and 21have this binding, contacting effect, resulting in a 100% pressureengagement of the threads, whereas in the engagement of the threadedmember A, which may be the conventional nut, with a second threadedmember B, which may be the conventional bolt, only part of one series ofparallel planar surfaces of the threads engages with part of theadjacent parallel series of planar surfaces of the threads. Inrecognition of this fact, it has been customary to flatten the crests ofthe threads of members A and B as shown in Fig. 4 so that theeffectively engaging surfaces of the conventional threaded bolt and nutis only 37% as against the 100% thread engagement in the use of thestructure of my invention.

On assemblyof the parts as shown in Fig. 3, theithreads I 3 and 21 willbe fully engaged as described above so as to provide an effective sealand the parts will automatically tend to resist displacement due tovibration or other extraneous forces. To disengage the parts, theexternal member I2 is rotated in a reverse direction to that used in theassembly of the parts. After rotating the external member I 2 for partof a revolution, the external member may be tapped at the outer facethereof in the general direction of the arrow 28. This action will shiftthe internal member in the aperture l6, breaking the taper seal so thatfurther rotation of the external member l2 to disengage the parts may behad with comparative ease.

' the slit is located other than 180 If desired, the internal member llmay be provided with another keyway IE or with a plurality of suchadditional keyways so that the user may select the one to receive thekey l8 for the purpose above described, within the purview of this.invention. Any other means for axially keying the internal member II inthe external member l2 equivalent to the key l8 and keyway l5 would alsocome within. the purview of this invention.

Definitions: The term ,predetermined wrapping efiect as used in thespecification and claims hereof shallbe deemed to mean the location ofthe slit relative to the keying means so that on engagement ordisengagement of the members a wrappin effect is attained where from thekeying means and where the slit is located at 180 from. the keying meansthe wrapping eflect is nilin short, the term shall be deemed to meanpredetermining whether and if so the degree of the wrapping effect to beattained by the relative location of the parts referred to. The partsmay be made of any desirable or suitable material and the dimensionsthereof may be varied to suit the requirements of the use to which thesame are to be put, the representation in the drawing being solely forthe sake of illustrating one embodiment of the invention.

. Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

A lock nut unit comprising an internal member provided with an axialslit, said member being externally tapered and intemallythreaded, and anexternal member provided with an internal flange and with an internallytapered portion, with the largest diameter of said internally taperedportion adjacent the flange, said internal member being provided with anexternal keyway, and said external member being provided with aninternal key provided with positive force imparting surfaces andextending from the internally tapered portion thereof and adapted to bereceived in the keyway of said internal memher, said keyway being solocated circumferentially relative to the slit as to provide apredemined wrapping effect on assembly and use of the unit.

F. LE BARRON LORD.

